阿 + last syllable of someone's given name is the standard southern Chinese / Cantonese / Taiwanese pattern for affectionate nicknames (阿强, 阿玲, 阿伟). The most internationally famous 阿梅 is 张惠妹 (Chang Hui-mei) — the Taiwanese Puyuma-aboriginal pop diva nicknamed the 'Diva of Asia,' active since the late 1990s and still selling out arenas.
usage
Used among family, close friends, or to address someone younger/familiar. Don't use 阿+name with bosses, elders you don't know well, or in formal settings.
